Evidence-Based Practice

This tutorial teaches you how to evaluate the health information that you find on the Web. It is about 16 minutes long.

You need the Flash plug-in, version 8 or above, to view it. If you do not have Flash, you will be prompted to obtain a free download of the software before you start.The tutorial runs automatically, but you can also use the navigation bar at the bottom of the screen to go forward, backward, pause, or start over.

This interactive calculator can determine diagnostic test characteristics (sensitivity, specificity, likelihood ratios) and/or determine the post-test probability of disease given the pre-test probability and test characteristics. Given sample sizes, confidence intervals are also computed.

These calculators were created for your own personal use and testing purposes. They are to be used as a guide only. Medical decisions should NOT be based solely on the results of these programs. Although this program has been tested thoroughly, the accuracy of the information cannot be guaranteed.

The concept of Number Needed to Treat has become popular because it combines an estimate of the Relative Benefit of a particular treatment with the background risk of patients. It is the inverse of the Absolute Risk Reduction and represents how many people would need to receive a particular treatment or intervention in order that one of them should benefit from the treatment.